I looked up comparative images side by side on google. I don’t think there is any way you can tell the difference between carp and shad while they are immature and in the water. The only distinguishing features are the lower lip and the anal fin. They picture them side by side and are almost identical..I was at Fenton acces close to Kenlake. I’ll get down there this week and take my throw net and take some pics. I hope I’m , wrong but the growth rate is swinging me more towards carp than shad.